configure: WARNING: --enable-widec is deprecated, wide-character/UTF-8 is always enabled
chartype.c: In function ‘ct_encode_char’:
chartype.c:209:17: warning: ignoring return value of ‘wctomb’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  209 |                 wctomb(NULL, L'\0');
      |                 ^~~~~~~~~~~~~~~~~~~
vi.c: In function ‘vi_histedit’:
vi.c:1036:9: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1036 |         write(fd, cp, len);
      |         ^~~~~~~~~~~~~~~~~~
vi.c:1037:9: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1037 |         write(fd, "\n", (size_t)1);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
readline.c: In function ‘history_truncate_file’:
readline.c:1411:23: warning: ignoring return value of ‘ftruncate’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1411 |                 (void)ftruncate(fileno(fp), off);
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~
wtc1.c: In function ‘complete’:
wtc1.c:75:9: warning: ignoring return value of ‘wctomb’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   75 |         wctomb(NULL, 0); /* Reset shift state */
      |         ^~~~~~~~~~~~~~~
libtool: warning: remember to run 'libtool --finish /usr/lib'